My son is a 3rd grader and wanted to do a science fair project on solar cells. So we devised an experiment to see if reflecting light with a mirrow would increase power output. We constructed a circuit using an amp-meter, solar cell, and 10Kohm resistor. He hypothesized that reflecting sun light (in addition to the incident sun light) would create more power; I agreed with his hypothesis. We were surprised that the measured power was less: Direct sun light only: 360 micro-amps Plus reflected sun light: 340 micro-amps Can anybody (in terms a 3rd grader would understand) explain why this is? BTW, the results are very reproducable.